Workarounds: The A, B and C checkpoints serve all airline gates on Concourses A, B and C, as they are all connected. Passengers on Southwest Airlines, AirTran Airways, American Airlines and Spirit Airlines may use the A, B or C checkpoints to reach their gates.

On Concourses A, B and C, Southwest Airlines offers seating areas with power connections and charging stations. Delta Air Lines provides charging stations at its gates on Concourse D. There are also charging stations throughout Concourse D and in the main terminal Observation Gallery.

Go local

Good choice for local gifts: Maryland/DC-theme gifts available at America! (Concourses A/B, and D), Talie (Concourse D), and various newsstands. See all shopping options.

A refurbished observation gallery with aviation exhibits, charging stations, a children's play area and a food/beverage concession (Sky Azure) serving small plates, beer, wine and cocktails is on the upper level of the terminal, pre-security, between Concourses B and C. (Open 8 a.m. - 9 p.m.) Near the Observation Gallery is an exhibit about the life of civil rights activist Thurgood Marshall and an exhibit about the history of the area before it was an airport is located in the pre-security lobby area. There's also a pet relief area, a pay-per-use airport club (Airspace Lounge), and a large stained-glass crab by Skywalk A.

Nearby layover option

Ten rentable bikes are available outside the airport's International Terminal, near the BWI Marshall Airport Light Rail stop. Through the Zagster app, riders can get a code to unlock a bike ($5 for up to 12 hours; monthly pass for $15).

The 12.5-mile, paved BWI Trail circles the airport and is accessible from outside the International Terminal and from several parking areas. The trail passes the Thomas Dixon Airport Observation Park on the southern edge of the airport.